The Delta BreezGreenBuilder GBR80 is the perfect combination of power, quality and performance in a bath fan, and at a value price. Air flow of 80 CFM with loudness rating of 0.6 sones. Features a DC brushless fan motor for superior reliability and efficiency, and extremely low power consumption. The fan operates using 10.5 Watts with an efficiency rating of 7.6 CFM per Watt. Easy to install; smaller size than most performance fans on the market. ENERGY STAR qualified and HVI certified.